A touch display device including a display panel and a touch device is provided. The display panel includes a plurality of sub-pixels. Each of the sub-pixels includes a pixel electrode and a switching element. The touch device is located on the display panel and includes a touch electrode area and a dummy electrode area. The touch device includes an electrode structure and a conductive mesh. The conductive mesh includes a plurality of reticulated repeating units. Each of the reticulated repeating units is overlapped with at least one corresponding sub-pixel and includes first and second X-shaped conductive structures. Two ends of the first X-shaped conductive structure are connected to two ends of the second X-shaped conductive structure. The first and second X-shaped conductive structures in the touch electrode area are in a continuous pattern. The first and second X-shaped conductive structures in the dummy electrode area are in a discontinuous pattern.